2 /* Prototype : array array_diff(array $arr1, array $arr2 [, array ...])
3 * Description: Returns the entries of $arr1 that have values which are not
4 * present in any of the others arguments.
5 * Source code: ext/standard/array.c
9 * Test how array_diff compares arrays that
10 * 1. Contain referenced variables
11 * 2. Have been referenced to each other
13 <<__EntryPoint
>> function main(): void
{
14 echo "*** Testing array_diff() : usage variations ***\n";
17 $arr1 = vec
["&$a", 'b', 'c'];
19 echo "-- Basic Comparison --\n";
20 var_dump(array_diff($arr1, $arr2));
21 var_dump(array_diff($arr2, $arr1));
25 echo "-- \$a changed --\n";
26 var_dump(array_diff($arr1, $arr2));
27 var_dump(array_diff($arr2, $arr1));